Is using someone's name a lot in conversation a sign of flirting/attraction?

I am getting closer with a guy at work. I really like him. I'm pretty sure he feels the same way. However I do value our growing friendship.

Recently he started to insert my name when greeting me or just before parting ways. "Hey Sarah.." "Alright Sarah"

He has never done this before and it has me curious. Has anyone experienced this where there is an abrupt change in the way he or she talks to you?
Is using someone's name a lot in conversation a sign of flirting/attraction?
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